Dissappearence of parameters after jumping.

I've got a simple report with a data table full of information. I've added a third parameter, alongside a start and end date, called SortBy. This enables the user to choose which column to sort by and the report re-sorts accordingly after clicking 'View Report'.

I also added a feature where the user could click on the column header and in it's properties I set 'jump to report' to point at itself and set the parameters section relative to the column header.

When the users sort in this second way, the entire parameter list at the top of the report dissappears never to return. This a feature or a bug?